Is a system wide UML class diagram for LibreOffice 4.4.3.2 available somewhere?

For a study project I need to analyse the structure of the LibreOffice code. Therefore I am highly in need of a UML Class diagram of the entire (or multiple on subsystem level) LibreOffice system.

Considering roughly 148 folders with subfolders with code and the fact that Visual Paradigm 12.1 professional instant reverse often results in a huge "GLOBAL" class or parse errors most of the times I can't generate an UML from the code project back.